We bought this bike a week ago, and are planning to take it out tomorrow. Yesterday, we went to test it, and where the last couple times it kicked started first try, it wouldn't start at all. Where the exhaust meets the engine, it's spewing gas and oil. It looks like there should be two springs there, and there's not, but I can't see how one would magically disappear. We have gas (obviously) and we have spark (painfully) but now we're stuck. I don't know the first thing to try. Suggestions?